20165606652 has 48 divisors (see below), whose sum is σ = 51167440800. Its totient is φ = 6155476992.

The previous prime is 20165606647. The next prime is 20165606653. The reversal of 20165606652 is 25660656102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20165606652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165606653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1328277 + ... + 1343372.

It is an arithmetic number, because the mean of its divisors is an integer number (1065988350).

Almost surely, 2^20165606652 is an apocalyptic number.

It is an amenable number.

20165606652 is an abundant number, since it is smaller than the sum of its proper divisors (31001834148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20165606652 is a wasteful number, since it uses less digits than its factorization.

20165606652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671710 (or 2671708 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20165606652 in words is "twenty billion, one hundred sixty-five million, six hundred six thousand, six hundred fifty-two".